TRANSISTOR BINARY PULSE REGENERATOR 



LINE 



INPUT 



K 



Z>^ 



LINE 

 EQUALIZER 



REGENERATIVE 



REPEATER 



M 



R 



AAAr 



A^A^■ 



R 



LINE 



Da 



R 



AAA- 



R 



REGENERATIVE 



REPEATER 



N 



SIGNAL 

 OUT , 



>c 



1063 



— I LINE 



Fig. 2 — Block diagram of a section of equalized line and its terminating 

 regenerative repeaters. 



compared to the pulse at the input of the repeater. The transient re- 

 sponse of the regenerated pulse after passing through its output trans- 

 former f will be 



Tiv = fcivPive"'^'-'^^ (3) 



7 T^ '''l ~~^^ 



KN^Ne e 



(4) 



If the transient (4) is attenuated by factor 3 and added in opposite phase 

 to Tm through the feedback loop at the input of the repeater, their sum is 



T,r 



BT.y = ak-MPMc''' - 8kNPNe"'e~'" 



-bl. 



bt\ 



= e-'Xak,,PM - Bk^Pj.e"'') 

 This can be made equal to zero if 



akufPyi = Bk^PiijC 



(5) 

 (0) 



(7) 



which is accomplished by adjusting the value of d which represents the 

 feedback attenuation introduced by resistances R. If the regenerated 



t It is assumed that the electrical characteristics of the output transformers 

 of all the repeaters are identical. In this case the damping coefficients will be 

 identical for all the regenerated outputs. 



